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Effect of Flow Conditions on the Deposition of Platinum Nanoparticles on Stainless Steel Surfaces.

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Title: Effect of Flow Conditions on the Deposition of Platinum Nanoparticles on Stainless Steel Surfaces.
Authors: Grundler, Pascal V.1 pascal.grundler@psi.ch, Ramar, Amuthan1,2, Veleva, Lyubomira1, Ritter, Stefan1
Source: Corrosion. Jan2015, Vol. 71 Issue 1, p101-113. 13p.
Subjects: Platinum nanoparticles, Nanoparticles, Platinum, Stainless steel, Chrome steel
Abstract: Stress corrosion cracking of stainless steel components in boiling water reactors can threaten their structural integrity and lead to costly maintenance operations. A low electrochemical corrosion potential can reduce the susceptibility of stainless steel to stress corrosion cracking. Injecting hydrogen into the reactor feed water lowers the ECP. The efficiency of hydrogen injection is improved in presence of catalytically active noble metals. Therefore, platinum (Pt) compounds are added to the reactor feed water and then deposit on the water-wetted surfaces. To understand the parameters affecting the application and mitigation processes, stainless steel coupons in as-received or pre-oxidized conditions were exposed in a high-temperature water loop to simulated boiling water reactor water conditions with the addition of platinum. Coupons were placed at three locations: in an autoclave with quasi-stagnant flow conditions (few mm/s), in a specimen holder with a flow velocity of 0.10 m/s, and in another with a flow velocity of 0.52 m/s. Independently of parameters such as platinum injection rate or water chemistry, coupons exposed to a transitional flow regime showed a lower platinum loading than the coupons exposed to a turbulent flow or suspended in the autoclave under quasi-stagnant flow. [ABSTRACT FROM AUTHOR]
Copyright of Corrosion is the property of Association for Materials Protection & Performance (AMPP) and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 100889396
AccessLevel: 6
PubType: Academic Journal
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  Data: Effect of Flow Conditions on the Deposition of Platinum Nanoparticles on Stainless Steel Surfaces.
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  Data: <searchLink fieldCode="AR" term="%22Grundler%2C+Pascal+V%2E%22">Grundler, Pascal V.</searchLink><relatesTo>1</relatesTo><i> pascal.grundler@psi.ch</i><br /><searchLink fieldCode="AR" term="%22Ramar%2C+Amuthan%22">Ramar, Amuthan</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Veleva%2C+Lyubomira%22">Veleva, Lyubomira</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ritter%2C+Stefan%22">Ritter, Stefan</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Corrosion%22">Corrosion</searchLink>. Jan2015, Vol. 71 Issue 1, p101-113. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Platinum+nanoparticles%22">Platinum nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoparticles%22">Nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Platinum%22">Platinum</searchLink><br /><searchLink fieldCode="DE" term="%22Stainless+steel%22">Stainless steel</searchLink><br /><searchLink fieldCode="DE" term="%22Chrome+steel%22">Chrome steel</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Stress corrosion cracking of stainless steel components in boiling water reactors can threaten their structural integrity and lead to costly maintenance operations. A low electrochemical corrosion potential can reduce the susceptibility of stainless steel to stress corrosion cracking. Injecting hydrogen into the reactor feed water lowers the ECP. The efficiency of hydrogen injection is improved in presence of catalytically active noble metals. Therefore, platinum (Pt) compounds are added to the reactor feed water and then deposit on the water-wetted surfaces. To understand the parameters affecting the application and mitigation processes, stainless steel coupons in as-received or pre-oxidized conditions were exposed in a high-temperature water loop to simulated boiling water reactor water conditions with the addition of platinum. Coupons were placed at three locations: in an autoclave with quasi-stagnant flow conditions (few mm/s), in a specimen holder with a flow velocity of 0.10 m/s, and in another with a flow velocity of 0.52 m/s. Independently of parameters such as platinum injection rate or water chemistry, coupons exposed to a transitional flow regime showed a lower platinum loading than the coupons exposed to a turbulent flow or suspended in the autoclave under quasi-stagnant flow. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Corrosion is the property of Association for Materials Protection & Performance (AMPP) and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.5006/1263
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 101
    Subjects:
      – SubjectFull: Platinum nanoparticles
        Type: general
      – SubjectFull: Nanoparticles
        Type: general
      – SubjectFull: Platinum
        Type: general
      – SubjectFull: Stainless steel
        Type: general
      – SubjectFull: Chrome steel
        Type: general
    Titles:
      – TitleFull: Effect of Flow Conditions on the Deposition of Platinum Nanoparticles on Stainless Steel Surfaces.
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            NameFull: Ramar, Amuthan
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            – D: 01
              M: 01
              Text: Jan2015
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              Y: 2015
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            – TitleFull: Corrosion
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